Hydromystria expansa

No picture of Hydromystria expansa was found. Wikipedia and Wikidata were searched and had none. iDigBio and GBIF were not searched: the Paleobiology Database does not place Hydromystria expansa firmly enough to tell it from something else bearing the same name, and a search on the name alone returns whichever of them was photographed. Smithsonian Open Access did not answer, so this is what the others held rather than everything there is.

Time the record covers

At most 10 million years on record.

Every occurrence read is dated to somewhere between 66 Mya and 56 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Late Cretaceous — about 0 of 22 occurrencesPaleocene — about 22 of 22 occurrencesPaleoceneEocene — about 0 of 22 occurrences66–66 Mya — about 0.6 occurrences66–65 Mya — about 0.9 occurrences65–65 Mya — about 0.9 occurrences65–65 Mya — about 0.9 occurrences65–64 Mya — about 0.9 occurrences64–64 Mya — about 0.9 occurrences64–64 Mya — about 0.9 occurrences64–63 Mya — about 0.9 occurrences63–63 Mya — about 0.9 occurrences63–62 Mya — about 0.9 occurrences62–62 Mya — about 0.9 occurrences62–62 Mya — about 0.9 occurrences62–61 Mya — about 0.8 occurrences61–61 Mya — about 0.7 occurrences61–61 Mya — about 0.7 occurrences61–60 Mya — about 0.7 occurrences60–60 Mya — about 0.7 occurrences60–60 Mya — about 0.7 occurrences60–59 Mya — about 0.7 occurrences59–59 Mya — about 0.7 occurrences59–58 Mya — about 0.7 occurrences58–58 Mya — about 0.7 occurrences58–58 Mya — about 0.7 occurrences58–57 Mya — about 0.7 occurrences57–57 Mya — about 0.7 occurrences57–57 Mya — about 0.7 occurrences57–56 Mya — about 0.7 occurrences56–56 Mya — about 0.5 occurrences66.5 Mya55.5 Mya

22 occurrences of Hydromystria expansa on record, most of them in the Paleocene. Bar height is expected occurrences, not a count: each fossil is spread across the span it is dated to, so a tall narrow bar means tight dating and a low wide one means loose.

When

22 occurrences

These are dates about fossils, not the animal: the record can only begin after it arose and end before it died out, so either end may reach further. Shares are expected occurrences: a fossil dated to a span is counted partly in each period it straddles. More on what this infers.

Found in

6 formations

Fort Union — 47.10°N, 104.72°WFort Union — 47.32°N, 106.92°WFort Union — 44.93°N, 106.95°WFort Union — 46.10°N, 109.95°WFort Union — 41.37°N, 109.23°WFort Union — 44.95°N, 107.33°WFort Union — 47.22°N, 104.67°WFort Union — 47.38°N, 104.40°WFort Union — 46.87°N, 105.44°WFort Union — 43.88°N, 108.52°WFort Union — 41.28°N, 109.19°WFort Union — 46.21°N, 102.78°WFort Union — 47.90°N, 102.82°WFort Union — 46.37°N, 102.33°WTullock — 46.58°N, 105.88°WTullock — 45.37°N, 105.54°WCoalmont — 40.73°N, 106.42°WDawson arkose — 39.12°N, 104.17°WFerris? — 41.95°N, 106.82°WFort Union? — 46.57°N, 101.03°W

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The named rock units Hydromystria expansa has been recovered from, largest first. Drawn where the rock is now, not where it formed.

Hydromystria expansa and its relatives

Paleocene

Where Hydromystria expansa and its relatives were recorded in the Paleocene.

Found in the same rock

57 taxa

The Paleobiology Database records 22 sites for Hydromystria expansa, and this reads all of them. The number is how many of those sites it was catalogued from too. The 24 sharing the most are listed.

This is not a list of everything alive at the time. It is only what has come out of the same ground as this animal and been written down.

Entered from

1 reference

Each of the 22 occurrences read was entered from one of these publications, ordered by how many each accounts for. This is not a search for papers mentioning the name. Each entry links to doi.org. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.

Media and terms

Media content0

No picture of Hydromystria expansa was found. Wikipedia and Wikidata were searched and had none.

iDigBio and GBIF were not searched: the Paleobiology Database does not place Hydromystria expansa firmly enough to tell it from something else bearing the same name, and a search on the name alone returns whichever of them was photographed.

Smithsonian Open Access did not answer, so this is what the others held rather than everything there is.

No 3D scan of Hydromystria expansa was found in MorphoSource and Sketchfab.

Smithsonian Open Access was not reached for this taxon, so this list is what the others held rather than everything there is.

This is what the site found, which is not the same as what exists.

Keep going

What may have been alongside itFormations of the PaleoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0.